Armand de Valois, a fallen nobleman, is trapped by a ruinous family debt. His cousin's widow, the cold, powerful English heiress Eliza, offers a terrifying solution: indenture. Armand must become her personal property, a line item in her ledger, working off the impossible debt until every last sou is repaid. Stripped of his name, his dignity, and his autonomy, Armand is reduced to his Mistress's favored plaything. He is publicly collared, physically disciplined with a cane, and forced into the most intimate acts of service, becoming a devoted servant in her luxurious, terrifying world. But when Eliza faces societal threats and illness, Armand’s devotion proves absolute. He accepts his final role as her eternal Steward, forever bound by the golden cage of her exquisite design, and gladly paying his eternal debt in unwavering service.